public class Test3 extends Test3test {
    public Test3() {
        System.out.println("子类的构造方法调用");
    }

    public static void main(String[] args) {
        Test3 test = new Test3();
    }
}
class Test3test {
    int a = 0;
    public Test3test() {
        System.out.println("父类的构造方法调用 ");
    }
}
